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压缩因子在天然气开发与输运过程中是很重要的物性参数,其它一些参数的变化与压缩因子密切相关。但是对于高含硫天然气由于H2S的存在,使得临界参数产生较大偏差。目前应用较多的计算压缩因子的方法多是针对常规天然气的,故利用这些方法来计算高含硫天然气的压缩因子会产生较大误差。对于硫化氢摩尔含量小于12%的高含硫天然气体系,用RK、SRK、PR、BWRS状态方程计算在1.05≤Tr≤2,0≤Pr≤13范围内的压缩因子,并与标准压缩因子图进行了对比分析,得出这四个状态方程的适用范围。
The compression factor is a very important physical parameter in the process of natural gas development and transportation. The change of some other parameters is closely related to the compression factor. However, due to the presence of H2S in high-sulfur natural gas, the critical parameters are greatly deviated. At present, many methods for calculating compression factor are mostly applied to conventional natural gas, so using these methods to calculate the compression factor of high-sulfur natural gas will produce large errors. For the natural gas with high sulfur content less than 12%, the compression factors in the range of 1.05≤Tr≤2, 0≤Pr≤13 were calculated by the equation of state RK, SRK, PR and BWRS, and compared with the standard compression factor map Conducted a comparative analysis, draw the scope of the four state equations.